//: interfaces/classprocessor/Apply.java
package interfaces.classprocessor;

import java.util.*;

import static net.mindview.util.Print.*;

class Processor
{
    public String name()
    {
        return getClass().getSimpleName();
    }
    
    Object process(Object input)
    {
        return input;
    }
}

class Upcase extends Processor
{
    String process(Object input)
    { // Covariant return
        return ((String)input).toUpperCase();
    }
}

class Downcase extends Processor
{
    String process(Object input)
    {
        return ((String)input).toLowerCase();
    }
}

class Splitter extends Processor
{
    String process(Object input)
    {
        // The split() argument divides a String into pieces:
        return Arrays.toString(((String)input).split(" "));
    }
}

public class Apply
{
    public static void process(Processor p, Object s)
    {
        print("Using Processor " + p.name());
        print(p.process(s));
    }
    
    public static String s = "Disagreement with beliefs is by definition incorrect";
    
    public static void main(String[] args)
    {
        process(new Upcase(), s);
        process(new Downcase(), s);
        process(new Splitter(), s);
    }
} /*
   * Output: Using Processor Upcase
   * DISAGREEMENT WITH BELIEFS IS BY DEFINITION INCORRECT
   * Using Processor Downcase
   * disagreement with beliefs is by definition incorrect
   * Using Processor Splitter
   * [Disagreement, with, beliefs, is, by, definition, incorrect]
   */// :~
